All you need to do to get a sim card is to tell thym you want one and they will mail it free... you sign up for the international plan but you need not go anywhere....
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International:
Inside USA: 1-888-226-7212
Outside USA (toll free): 001-817-698-4199
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Sprint: G1000, HTC-6600, 6800, TP2 now Optimus S with Stock Android 2.2.2.